??????? ??? ????????? ??? ioi997 ??? ?????? ???? ????? ????????? ??? ????? ????????. ????? ??? ??????????? ???-??? ?? 24??????? ???? ??????????? ??? ??? ????? ??????????????????????? ???????????? ??????? ?????? ??? ioi997 .??????????????????? ?????????? . ???????? ????? ??? ???????? ???! ??? ????? ioi997 ???????????????? ???? ???????? ?